C5 IAC count vs Fbody IAC count
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TECH Senior Member
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Joined: Nov 2001
Posts: 7,000
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From: Lexington, Ky
C5 IAC count vs Fbody IAC count I'm coming up on a cam install in my C5 and I'll need to drill the TB to get the proper IAC count. On the Fbody's you want your IAC count to be in the high 30's to low 40's at idle. I just tested my C5 (stock cam, etc) to see what it was before and mine reads 107-109 at operating temperature. Since the C5's have a throttle by wire and F-Bodies have a throttle by cable is this why I have such a different IAC count? Thanks.
On The Tree
Joined: Jan 2002
Posts: 110
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From: Suwanee, Georgia
Re: C5 IAC count vs Fbody IAC count Yes, IAC counts run higher on the Vettes.. typically the h/c guys end up with holes in the 3/16 to 7/32 range.. too large and engine takes forever to settle down to an idle. too small and you stumble. You can always start at 1/8 and work your way up..
